Rod Stewart celebrated Celtic 's crunch victory over Rangers with a sing-song with fans after the match.

The Hoops-daft rockstar watched Neil Lennon's men win a tempestuous affair at Parkhead after beating their rivals 2-1, a result that all-but secured an eighth consecutive title.

The 74-year-old joined singer Liam McGrandles in a post-match duet of Irish ballad Grace, which has rang out in the stands in recent years.

Rod Stewart celebrates at Parkhead (Image: Getty)

Stewart released a version of the song last year, which tells the story of Grace Gifford, who married her doomed fiance Joseph Plunkett just hours before he was executed in Kilmainham Gaol as one of the leaders or the 1916 Easter Rising.

Fans sang along with the pair who were clearly revelling in the occasion, with McGrandles describing Stewart as "buzzing".